well, you're dealing in $$$, so you prob. want floats...but where is
your FloatField? an attribute of your class Price? or can you cast
your Price class to a float?
pr = 0.0
for a in cart:
pr = pr + float(a['choice'].price)
do you understand how classes in object oriented languages work? you
can only add numbers together, not your own custom classes. (without
some extra work i expect - i don't know how operator overloading in
python works, or even if it exists) this is what your error statement
is telling you...that you're trying to add a number to a non-number
class. you have to pull the actual number out of whatever class
structure you've put it in.
Greg wrote:
> Derek,
> Ok...I made the change and I'm now getting the error:
>
> TypeError at /rugs/cart/1/4/
> unsupported operand type(s) for +: 'int' and 'Price'
>
> Is 'a['choice'].price' not an Int? It says it is in my model file.
>
> ////////////////////////////////////
>
> Here is my view
>
> def showcart(request, style_id, choice_id):
> s = Style.objects.get(id=style_id)
> c = Choice.objects.get(id=choice_id)
> #x = c.size, " ", c.price
> cart = request.session.get('cart', [])
> cart.append({'style': s, 'choice': c})
> request.session['cart'] = cart
> pr = 0
> for a in cart:
> pr = pr + a['choice'].price
> return render_to_response('show_test.html', {'mychoice': cart, 'p':
> pr})
>
>
> /////////////////
>
> Here is my template file:
>
> {% extends "rug_leftnav.html" %}
> {% block body %}
> {% for a in mychoice %}
> {{ a.style.manufacturer }} - {{ a.style.collection }} - {{ a.style }}
> - {{ a.choice.size }} - ${{ a.choice.price }}.00
> <br>
> {% endfor %}
> {{ p }}
> {% endblock %}
>
> //////////////
>
> Here are some of my model classes:
>
> class Size(models.Model):
> name = models.CharField(maxlength=100)
>
> def __str__(self,):
> return self.name
>
> class Admin:
> pass
>
> class Price(models.Model):
> name = models.IntegerField()
>
> def __str__(self,):
> return str(self.name)
>
> class Admin:
> pass
>
>
> class Choice(models.Model):
> choice = models.ForeignKey(Collection, edit_inline=models.TABULAR,
> num_in_admin=5)
> size = models.ForeignKey(Size, core=True)
> price = models.ForeignKey(Price, core=True)
> def __str__(self,):
> return str((self.size, self.price))
>
> class Style(models.Model):
> name = models.CharField(maxlength=200)
> color = models.CharField(maxlength=100)
> image = models.ImageField(upload_to='site_media/')
> theslug = models.SlugField(prepopulate_from=('name',))
> manufacturer = models.ForeignKey(Manufacturer)
> collection = models.ForeignKey(Collection)
> sandp = models.ManyToManyField(Choice)
>
> class Admin:
> search_fields = ['name']
> list_filter = ('collection',)
> list_display = ('name', 'theslug','collection', 'rmanu')
>
> js = (
> '/site_media/ajax_yahoo.js',
> )
>
> def __str__(self,):
> return self.name
>
> def rmanu(self):
> return self.collection.manufacturer
>
>
> //////////////////////
>
>
> Thanks for your help Derek
>
>
> On Jul 19, 4:46 pm, Derek Anderson <[EMAIL PROTECTED]> wrote:
>> you were supposed to substitute "value" with whatever column you have
>> defined. (you didn't post your model def)
>>
>> Greg wrote:
>>> Derek,
>>> I tried that and now I get the following error:
>>> AttributeError at /rugs/cart/1/4/
>>> 'Choice' object has no attribute 'value'
>>> /////////////
>>> Here is my view
>>> def showcart(request, style_id, choice_id):
>>> s = Style.objects.get(id=style_id)
>>> c = Choice.objects.get(id=choice_id)
>>> #x = c.size, " ", c.price
>>> cart = request.session.get('cart', [])
>>> cart.append({'style': s, 'choice': c})
>>> request.session['cart'] = cart
>>> pr = 0
>>> for a in cart:
>>> pr = pr + a['choice'].value
>>> return render_to_response('show_test.html', {'mychoice': cart, 'p':
>>> pr})
>>> /////////
>>> On Jul 19, 4:22 pm, Derek Anderson <[EMAIL PROTECTED]> wrote:
>>>> you're not adding two ints, you're adding an int to an instance of your
>>>> Choice class. make your line:
>>>> pr = pr + a['choice'].value
>>>> or whatever you called it.
>>>> Greg wrote:
>>>>> Hello,
>>>>> I have the following view
>>>>> def showcart(request, style_id, choice_id):
>>>>> s = Style.objects.get(id=style_id)
>>>>> c = Choice.objects.get(id=choice_id)
>>>>> cart = request.session.get('cart', [])
>>>>> cart.append({'style': s, 'choice': c})
>>>>> request.session['cart'] = cart
>>>>> pr = 0
>>>>> for a in cart:
>>>>> pr = pr + a['choice']
>>>>> return render_to_response('show_test.html', {'mychoice': cart,
>>>>> 'p': pr})
>>>>> /////////
>>>>> Whenever i try this I get the error:
>>>>> TypeError at /rugs/cart/1/4/
>>>>> unsupported operand type(s) for +: 'int' and 'Choice'
>>>>> //////////////////////////
>>>>> Anybody know how I pull a value out of a dict and add it to a existing
>>>>> number?
>>>>> Thanks
>
>
> >
>
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